When your phone charges with a standard USB charger, it continues to draw power even after your device's battery is full. This isn't great for the battery and increases unnecessary power consumption (although it's pretty minimal). The GreenZero travel charger prevents both problems by shutting off when your device finishes charging.

Many USB chargers provide additional power to charge batteries faster. Less waiting is a clear…
Read more Read more

Like most single-USB chargers these days, the GreenZero takes up very little space and can fit in your pocket or your bag if you need to take it with you. Unfortunately you won't find any way to wrap your cable around it, but if you're willing to pay an extra $8 you can get a version with an integrated cable wrap (that intentionally looks like a green mushroom). If you just want this in plug form without a USB port, however, you should check out the Belkin Conserve Socket.